ethyl (7E)-7-[(4-methoxyphenyl)hydrazinylidene]-1-[(4-methoxyphenyl)methyl]-5,6-dihydro-4H-indole-2-carboxylate 在
polyphosphoric acid trimethylsilyl ester 作用下,
以
硝基甲烷 为溶剂,
反应 5.0h,
生成
ethyl 7-methoxy-1-(4-methoxybenzyl)-1H,10H-pyrrolo[2,3-a]carbazole-2-carboxylate